Canada's government says it is aware hackers breached security at a domestic manufacturer of...

Canada's government says it is aware hackers breached security at a domestic manufacturer of software used by big energy companies, but decline to comment on a report that a Chinese group could be responsible. If so, it could complicate matters for Ottawa, which must decide whether to approve the $15B bid by China’s Cnooc (CEO) to take over Nexen (NXY).